import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'


Vue.use(Router)

// export default new Router({
//   routes: [
//     { path: '/', redirect: '/login' },
//     { path: '/login', component: Login },
//     { path: '/Home', component: Home }
//   ]
// })

const router = new Router({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home', component: Home, redirect: '/welcome',
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users },
        { path: '/rights', component: Rights },
        { path: '/roles', component: Roles }
      ]
    }
  ]
})

//挂载路由导航首尾
router.beforeEach((to, from, next) => {
  //to将要访问的路径
  // from代表从哪个路径跳转而来
  // next是一个函数，表示放行
  //  next()放行 next('/login')强制跳转
  if (to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token');
  if (!tokenStr) return next('/login');
  next();

})

export default router